What are the advantages and disadvantages of including header.php, footer.php, and statisch.php in PHP files for website structure and SEO performance?

Including header.php, footer.php, and statisch.php in PHP files can improve website structure by allowing for modular design and easier maintenance. It can also help with SEO performance by ensuring consistent branding and navigation across all pages. However, it may slightly increase load times due to the additional server requests required to include these files.

<?php
include 'header.php';
// Content of the page goes here
include 'footer.php';
include 'statisch.php';
?>